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Finding the Fourth Proportional to 618.89, 853.92 and 353.34

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Solution

The fourth proportional to 618.89, 853.92 and 353.34 is: 487.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.89 : 853.92 = 353.34 : x
  2. Step 2: Convert to fraction form
    618.89/853.92 = 353.34/x
  3. Step 3: Cross multiply
    618.89x = 853.92 × 353.34
  4. Step 4: Simplify right side
    618.89x = 301,724.09
  5. Step 5: Solve for x
    x = 301,724.09/618.89
  6. Step 6: Final answer
    x = 487.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.